期刊
NANOMATERIALS
卷 9, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/nano9071055
关键词
silicon nanocrystal; activated carbon; nanocomposite; lithium-ion battery
类别
资金
- National Research Foundation of Korea through the Basic Science Research Program [2016R1A6A1A03012877, 2017R1A2B4004281]
- Korean government of the Ministry of Education
- National Research Foundation of Korea [2017R1A2B4004281] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The nanocomposites of activated-carbon-decorated silicon nanocrystals (AC < nc-Si > AC) were synchronously derived in a single step from biomass rice husks, through the simple route of the calcination method together with the magnesiothermic reduction process. The final product, AC < nc-Si > AC, exhibited an aggregated structure of activated-carbon-encapsulated nanocrystalline silicon spheres, and reveals a high specific surface area (498.5 m(2)/g). Owing to the mutualization of advantages from both silicon nanocrystals (i.e., low discharge potential and high specific capacity) and activated carbon (i.e., high porosity and good electrical conductivity), the AC < nc-Si > AC nanocomposites are able to play a substantial role as an anodic source material for the lithium-ion battery (LIB). Namely, a high coulombic efficiency (97.5%), a high discharge capacity (716 mAh/g), and a high reversible specific capacity (429 mAh/g after 100 cycles) were accomplished when using AC < nc-Si > AC as an LIB anode. The results advocate that the simultaneous synthesis of biomass-derived AC < nc-Si > AC is beneficial for green energy-storage device applications.
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